CASE REPORT

Weakness in pregnancy – expect the unexpected S Furara

MRCOG*,

M Maw

MBChB MRCP†,

F Khan

MRCOG*

and K Powell

MRCOG‡

*SPR Obstetrics and Gynaecology; †SHO Medicine; ‡Consultant in Obstetrics and Gynaecology, Mid Staffordshire General Hospitals, Western Road, Stafford ST16 3SA, UK

Summary: Guillain-Barre´ syndrome (GBS) is rare in pregnancy with an incidence estimated to be between 1.2 and 1.9 cases per 100,000 people annually, and it is generally accepted that it carries a high maternal risk. Delayed diagnosis is common because the initial non-specific symptoms may mimic changes in pregnancy. GBS should be considered in any pregnant patient complaining of muscle weakness, general malaise, tingling of the fingers and respiratory discomfort. This case aims to highlight the importance of early diagnosis, allowing prompt initiation of the immunomodulatory treatments which have been shown to improve outcome alongside multidisciplinary care. Keywords: Guillain-Barre´ syndrome, acute inflammatory demyelinating polyradiculopathy, pregnancy

CASE REPORT An 18-year-old gravida 5, para 1 presented at 26 weeks of pregnancy describing pain across her shoulders and upper back, ‘pins and needles’ in her fingers and shortness of breath. She had normal reflexes and, initially, there was no demonstrable weakness. She was admitted with a provisional diagnosis of ‘hyperventilation’. It was considered that her symptoms could be psychological given the normal examination findings and blood tests. However, over the next eight days she developed an ascending weakness with speech and swallowing difficulties. She had bilateral lower motor neurone facial weakness, bulbar speech, flaccidity in the limbs, areflexia and flexor plantar responses. There was reduction in all sensory modalities in her arms and legs. A diagnosis was made of Guillain-Barre´ syndrome (GBS) and this was supported by the results of a lumbar puncture: a raised cerebrospinal fluid (CSF) protein of 1.66 g/L and a normal cell count. She had no history of preceding illnesses and serological tests for Campylobacter, Cytomegalovirus, Epstein-Barr virus (EBV) and Mycoplasma pneumoniae were negative. Antibodies to the ganglioside GQ1b were positive. On day nine she developed progressive respiratory failure and was moved to the critical care unit for regular airway assessment and subsequent ventilation. A five-day course of intravenous immunoglobulins (0.4 g/kg/day) was commenced the same day. Episodic hypertension and tachycardia, representing autonomic dysfunction, were treated with labetalol. From day 16 onwards she was gradually weaned from mechanical ventilation as her muscle power improved. Throughout her admission regular fetal monitoring and ultrasonography demonstrated a normally growing fetus. She was discharged from critical care at 29 þ 5 weeks

Correspondence to: Dr M Maw, 7 Charlotte Road, Edgbaston, Birmingham B15 2NQ, UK Email: [email protected]

gestation to a neuro-rehabilitation centre where she made an excellent recovery. There was spontaneous rupture of the membranes at 39 weeks, progressing to a normal vaginal delivery of a girl weighing 3 kg with an Apgar score of eight at one minute and nine at five minutes.

DISCUSSION GBS is an acute inflammatory demyelinating polyradiculopathy (AIDP).2 It is thought to be immune-mediated, but its pathogenesis remains uncertain.5 About two-thirds of patients have had an infection within the previous six weeks, most commonly a flu-like illness or gastroenteritis. Implicated infectious agents include M. pneumoniae, Campylobacter jejuni, Cytomegalovirus and EBV.2 The preceding infection may cause an autoimmune response with the patient’s antibodies being triggered to attack various components of the peripheral nerve myelin and sometimes the axon.5 GBS typically presents with pain, numbness, paraesthesia or weakness in the limbs and this can be mistaken for a psychological complaint,2 leading to delay in diagnosis and treatment. The interval from onset of symptoms to diagnosis in pregnancy was reported to be more than one week in 50% of cases in one review of 22 pregnant patients with GBS, attributed to initial non-specific symptoms of GBS mimicking common pregnancy complaints.1 The diagnosis of GBS depends on clinical criteria supported by CSF findings and neurophysiological testing. Essential clinical criteria are progressive motor weakness and areflexia.6 Other features include respiratory failure, facial nerve involvement, bulbar and ocular nerves (in the Miller-Fisher variant), mild sensory symptoms and autonomic dysfunction. The disease reaches its peak at one to four weeks and then, after a variable plateau phase, recovery occurs over weeks or months.2 The CSF typically shows raised protein content and a normal cell count, but it may be normal in the first week.1,6 Nerve conduction studies are abnormal in approximately 90% of cases, showing multi-focal demyelination associated with secondary axonal DOI: 10.1258/om.2008.080011. Obstetric Medicine 2008; 1: 99 –101

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Table 1

Reported cases of Guillain-Barre´ syndrome in pregnancy from 1986 to 2007

No

(Reference)

Gestation (weeks)

Specific treatment

Ventilatory support

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

(12) (13) (14) (15) (3) (16) (16) (17) (18) (19) (19) (19) (20) (21) (21) (22) (23) (23) (24) (25) (26) (27) (28) (29) (30) (7) (7) (31) (32) (33) (34) (35) (1) (36) (37) (37) (38) (39) (40) (40)

38 14 30 40 32 18 18 21 32 26 26 32 16 35 36 36 36 35 24 29 29 10 29 34 25 7 24 6 15 21 27 4 20 36 15 15 30 16 19 13

Plasmapheresis Plasmapheresis No Plasmapheresis No No No Plasmapheresis No Plasmapheresis Plasmapheresis Plasmapheresis Plasmapheresis No Plasmapheresis Plasmapheresis Plasmapheresis No Plasmapheresis Plasmapheresis No Plasmapheresis IVIG/Plasmapheresis IVIG/Plasmapheresis IVIG IVIG/Plasmapheresis No IVIG IVIG Plasmapheresis IVIG Plasmapheresis IVIG IVIG Plasmapheresis Plasmapheresis No IVIG IVIG IVIG

No Yes Yes No No Yes Yes Yes No No No No No No No Yes No No No No No No Yes Yes No Yes No Yes Yes No No No No No No No No No Yes No

Mode of delivery CS TOP PTL Forceps CS Maternal death Forceps CS CS CS SVD CS CS CS CS CS CS SVD SVD SVD Miscarriage SVD SVD SVD CS CS TOP SVD CS SVD TOP CS SVD SVD SVD CS Unknown CS CS

Gestation at delivery 40 16 34 39 25 38 37 40 33 36 35 38 36 36 36 38 35 40 40 20 38 37 38 38 41 9 40 40 37 18 39 41 26 26

37 32

Maternal outcome

Aetiology

Died three months postpartum Died five months postpartum Died one month postpartum Recovery Recovery Rehabilitation Residual disease Recovery Recovery Recovery Recovery Residual disease Recovery Residual disease Recovery Recovery Residual disease Residual disease Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery Residual disease Residual disease Probably recovery Probably recovery Residual disease Recovery Recovery Residual disease

Unknown CMV Unknown Unknown Unknown CMV CMV Unknown Unknown Unknown CMV CMV Unknown Unknown Unknown Unknown Unknown Unknown CMV Rubella Unknown CMV CMV Unknown Unknown Unknown EBV CMV Hepatitis A Unknown EBV Unknown Unknown Unknown CMV CMV Unknown Unknown Unknown Unknown

CMV ¼ cytomegalovirus; CS ¼ caesarean section; EBV ¼ Epstein-Barr virus; PTL ¼ preterm labour; SVD ¼ spontaneous vaginal delivery; TOP ¼ termination of pregnancy

degeneration.6 Mechanical ventilation may be required within 24 hours of symptom onset. Up to 20% of patients are disabled after one year as a result of GBS2 and a maternal mortality of 7% has been quoted (Table 1). The management of GBS in pregnancy is similar to that in the non-pregnant population7 and includes intravenous (i.v.) immunoglobulins and plasmapheresis. It is important that physicians and obstetricians manage the patient jointly.1 Ventilatory support is required in 25–30% of non-pregnant patients,2 but respiratory problems may be worse in pregnancy because of splinting of the diaphragm.8 In cases requiring ventilatory support in pregnancy, the risk of premature birth has been noted to be greatly increased.7 Thromboprophylaxis is indicated given hypercoagulability of pregnancy and immobility. Routine screening for respiratory and urinary infections is recommended. Labetalol is the agent of choice for management of autonomic dysfunction in the gravida, manifested by fluctuating pulse and blood pressure.2 This drug allows good blood pressure control without interfering with placental or fetal blood flow.9 A Cochrane review has shown that there are no outcome differences between i.v. immunoglobulins treatment and

plasmapheresis.4 In pregnancy, the safety of i.v. immunoglobulins has been established based on its use in treating conditions, such as maternal idiopathic thrombocytopenia purpura and fetal alloimmune thrombocytopenia.1 We found 12 cases of GBS in pregnancy in which i.v. immunoglobulins have been used, with no report of treatment-induced maternal or fetal complications (Table 1). In patients who have shown no signs of recovery within two weeks, a second course of i.v. immunoglobulins has shown to be beneficial.10 The benefit of plasmapheresis is great when started within seven days of disease onset, although it still provides some advantage within 30 days.5 On grounds of equivalent efficacy, similar cost, greater convenience and ease of administration, i.v. immunoglobulins have replaced plasmapheresis to be the preferred treatment in many hospitals.11 ACKNOWLEDGEMENT

We would also like to thank Dr P R Daggett (Consultant Physician, Mid Staffordshire General Hospitals) for his support in writing this case report.

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(Accepted 10 June 2008)

Weakness in pregnancy - expect the unexpected.

Guillain-Barré syndrome (GBS) is rare in pregnancy with an incidence estimated to be between 1.2 and 1.9 cases per 100,000 people annually, and it is ...
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